Dust cap for lubrication nipples



Patented Feb. 28, 1922.

B. H. SKELLY.

DUST CAP FOR LUBRICATION NIPPLES.

APPLICATION men Nov.21. 1920.

BEL- M M, w 5 J MW M UNITED STATES BERNARD H. SKELLY, OF BRIDGEPORT, CONNECTICUT.

DUST CAP FOR LUBRICATION NIPPLES.

Specification o To all whom it may concern:

Be it known that I, BERNARD H. SKELLY, a citizen of the United States, residinat the city of Bridgeport, in the county of airfield and State of Connecticut, have invented certain new and useful Improvements in Dust Caps for Lubrication Nipples; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to certain new and useful improvements in dust caps for lubricating nipples or shackle bolts, and the primary object of the invention is to provide a smooth unbroken bore for the reception of a lubricant gun nozzle, and a dust cap structure which is held in position under tension over said bore and which can be easily and quickly moved to open position and in the latter position positively held and disposed so as to permit the free and unobstructed use of a lubricant gun for the purpose of sup plying lubricant.

A still further object of the invention is to provide a construction wherein the parts are secured in position solely through frictional contact to thus necessitate a simple and single driving operation in order to apply the entire device to the bolt.

Further and other objects will be later set forth and manifested.

In the drawings:

Figure 1 is a side elevation;

Figure 2 is a top plan view;

Figure 3 is an enlarged fragmentary sectional view, and

Figure 4: is an enlarged fragmentary sectional elevation of a lubricating nipple equipped with the improved dust cap.

I- have shown my invention applied to both a shackle bolt and an ordinary lubrieating nipple, but the construction of the lubricant receiving element is substantially the same in both instances, and therefore the invention is not limited to adaptation to either of these specific forms of lubricant receiving elements.

Referring particularly to Figures 1, 2, and 3, wherein the invention is illustrated in connection with a shackle bolt 1, the latter is provided with the usual type of lubricating passage, the inlet to which latter is in fLettersPatcnt. Patented Feb. 28, 1922.

Application filed October 21, 1920. Serial No. 418,410.

the form of a smooth, unbroken elongated bore 2 whose mouth is provided with a countersunk annular seat 3.

Within the bolt 1 and parallel with the bore 2 is a hole orsocket 4:, which latter is entirely without said bore and has no connection there-with.

A cap 5 is shaped to conformably rest in the seat 3 and is provided with a pair of spaced holes through which the legs of an approximately J-shaped piece of wire or rod are extended so that a substantially U-shaped handle is provided. The shorter leg of the rod is riveted to the cap at 7,

while the longer leg extends into the hole 4 and has an abutment 8 formed on its free end. A coil spring 9 surrounds the longer leg of the J-shaped member 6 and at one end engages against the abutment, while its opposite end rests against the inner end of a sleeve 10, which latter has a driving fit in the hole 4 and is received over the longer leg of the J-member.

It will now be seen that with the parts related as depicted in Figure 3, of the drawings, it is merely necessary to drive the sleeve into the hole 4 wherein same is held by and through frictional contact and due to the fact that the only pressure exerted on the sleeve is that exerted by the light spring, there is no likelihood of the sleeve becoming displaced.

In operation the handle is grasped to move 7 the cap and therewith the longer leg of the member 6 against the action of the spring, until the cap is free of its seat 3, whereupon the cap, with the longer leg as avpivot is swung to one side until the seat and consequently the lubricant inlet 2, are exposed. In this position, the cap is held stationarily by the spring which, upon release of the cap expands and draws the cap against the bolt end in the position of Figure 1 of the drawings.

This dust cap structure may be applied to the lubrication nipples that are located at various points on an automobile chassis, and at Figure 4: there is shown such an adaptation, 11 being the nipple having its inner end 12 threaded so that it may be driven into the hearing or part to be lubricated.

While the bale 6 is quite serviceable, any

would extend loosely through the sleeve 10 into the hole l with a head 15 at the lower end, the spring 9 being confined and functioning as hereinbefore described, and this pin would be secured at its upper end to the cap 5, all as shown at Figure 4.

The chief featule'of this invention resides in the fact that the dust cap and the oil receiving chambers are admirably adapted for use in connection with a lubricant supply gun and the nozzle of the latter will fit snugly within thebore 2 since the latter has a smooth unbroken surface, while the dust cap can be lifted from its seat and swung to one side, so as to leave the bore 2 clear for the unobstructed introduction of the oil gun nozzle.

What is claimed is: V

The combination with a lubricating nipple having a smooth unbroken elongated bore of uniform diameterrwhich communicates directly withthe lubricant passage of the nipple, theouter end of said bore hav ing a. countersunk seat, of a cap adapted to conformably rest within saidseat, and-a BERNARD H. SKELLY. 

